/*
 * Copyright (c) 2004-2022, University of Oslo
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * Neither the name of the HISP project nor the names of its contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.hisp.dhis.matchers;

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeParseException;
import java.util.Locale;

import org.hamcrest.Description;
import org.hamcrest.Matcher;
import org.hamcrest.TypeSafeMatcher;

/**
 * @author Luciano Fiandesio
 */
public class DateTimeFormatMatcher extends TypeSafeMatcher<String>
{
    private final String format;

    public DateTimeFormatMatcher( String format )
    {
        this.format = format;
    }

    public boolean isValidFormat( String format, String value, Locale locale )
    {
        LocalDateTime ldt;
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern( format, locale );

        try
        {
            ldt = LocalDateTime.parse( value, formatter );
            String result = ldt.format( formatter );
            return result.equals( value );
        }
        catch ( DateTimeParseException e )
        {
            try
            {
                LocalDate ld = LocalDate.parse( value, formatter );
                String result = ld.format( formatter );
                return result.equals( value );
            }
            catch ( DateTimeParseException exp )
            {
                try
                {
                    LocalTime lt = LocalTime.parse( value, formatter );
                    String result = lt.format( formatter );
                    return result.equals( value );
                }
                catch ( DateTimeParseException e2 )
                {
                    // Debugging purposes
                    // e2.printStackTrace();
                }
            }
        }

        return false;
    }

    @Override
    protected boolean matchesSafely( String value )
    {
        return isValidFormat( this.format, value, Locale.getDefault() );
    }

    @Override
    public void describeTo( Description description )
    {
        description.appendText( "Invalid date format. Expected [" + format + "]" );
    }

    public static Matcher<String> hasDateTimeFormat( String format )
    {
        return new DateTimeFormatMatcher( format );
    }

}
